title: Use of the Frank sequence in pulsed EPR.
abstract: The Frank polyphase sequence has been applied to pulsed EPR of triarylmethyl radicals at 25 6 MHz (9.1 mT magnetic field), using 256 phase pulses. In EPR, as in NMR, use of a Frank sequence of phase steps permits pulsed FID signal acquisition with very low power microwave/RF pulses (ca. 1.5 mW in the application reported here) relative to standard pulsed EPR. A 0.2 mM aqueous solution of a triarylmethyl radical was studied using a 16 mm diameter cross-loop resonator to isolate the EPR signal detection system from the incident pulses.
authors.affiliation: Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Tseitlin
authors.forename: Richard W
authors.initials: RW
authors.lastname: Quine
authors.forename: Sandra S
authors.initials: SS
authors.lastname: Eaton
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Eaton
authors.forename: Howard J
authors.initials: HJ
authors.lastname: Halpern
authors.forename: J-H
authors.initials: JH
authors.lastname: Ardenkjaer-Larsen
mesh_terms: D001417:Background Radiation; D004574:Electromagnetic Fields; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005609:Free Radicals / Q000737:chemistry; D008872:Microwaves; D012984:Software; D014316:Tritium / Q000737:chemistry
chemical_list: D005609:Free Radicals; D014316:Tritium